blob: 754a268af1da63e54a9ce86794450dae70a09545 [file] [log] [blame]
#!/usr/bin/env fuchsia-vendored-python
# Copyright 2019 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
""" Pipe `fx syslog` through this tool for simpler stack traces.
E.g. `fx syslog | scripts/simplify_stacktraces`.
"""
import sys
import re
TEMPLATE_TAG = "###TEMPLATE###"
class TerminalEscapeCodes:
GREEN = '\033[92m'
ENDC = '\033[0m'
UNDERLINE = '\033[4m'
def simplify_cpp_file_path(path):
return re.sub(r"^../../out/[^/]+/../../", "", path)
def simplify_cpp_function_signature(function):
# To find "core part" to underline, strip out all param lists and templated
# types.
core_part = function
while True:
prev = core_part
core_part = re.sub(r"<[^<>]*>", "", core_part)
core_part = re.sub(r"\([^\(\)]*\)", "", core_part)
if prev == core_part:
break
core_part = re.sub(r"::\$[^:]+::operator", "", core_part)
core_part = re.sub(r"::'lambda'::operator", "", core_part)
core_part = re.sub(r"auto ", "", core_part)
core_part = re.sub(r"void ", "", core_part)
core_part = re.sub(r" const", "", core_part)
# To make function signature less verbose, replace templates with <...>
signature = function
while True:
prev = signature
signature = re.sub(r"<[^<>]+>", TEMPLATE_TAG, signature)
if prev == signature:
break
signature = re.sub(TEMPLATE_TAG, "<>", signature)
# Underline the "core part" in the signature
signature = signature.replace(core_part, TerminalEscapeCodes.UNDERLINE +
core_part + TerminalEscapeCodes.ENDC)
return signature
def is_cpp_stacktrace_entry(parts):
return len(parts) >= 7 and parts[3][:3] == "0x0"
def simplify_cpp_stacktrace_entry(parts):
prefix = parts[0] # "[01127.479810][1169][1262][klog]"
level = parts[1] # "INFO:"
index = parts[2] # "#1"
symbol = parts[3] # "0x00005a22a477d585"
function = " ".join(parts[5:-2]) # function signature, can contain spaces
file_path = parts[-2] # file path
function = simplify_cpp_function_signature(function)
file_path = simplify_cpp_file_path(file_path)
file_path = TerminalEscapeCodes.GREEN + file_path + TerminalEscapeCodes.ENDC
return "%s %s %s" % (index, file_path, function)
def main():
for line in sys.stdin:
line = line.strip()
parts = line.split()
if is_cpp_stacktrace_entry(parts):
print(simplify_cpp_stacktrace_entry(parts))
else:
# Contributions to handle other stacktrace types very welcome.
print(line)
if __name__ == '__main__':
sys.exit(main())